CN1170081A - Exhaust controller sparkling two stroke IC engine - Google Patents
Exhaust controller sparkling two stroke IC engine Download PDFInfo
- Publication number
- CN1170081A CN1170081A CN97113544A CN97113544A CN1170081A CN 1170081 A CN1170081 A CN 1170081A CN 97113544 A CN97113544 A CN 97113544A CN 97113544 A CN97113544 A CN 97113544A CN 1170081 A CN1170081 A CN 1170081A
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- Prior art keywords
- exhaust passageway
- mentioned
- exhaust
- cover part
- stroke
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- 239000000498 cooling water Substances 0.000 claims abstract description 41
- 230000002093 peripheral effect Effects 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 29
- 239000000725 suspension Substances 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 9
- 238000011144 upstream manufacturing Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 68
- 238000010304 firing Methods 0.000 description 7
- 238000009423 ventilation Methods 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 210000003414 extremity Anatomy 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 210000001364 upper extremity Anatomy 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 241000278713 Theora Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/028—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation for two-stroke engines
- F02D13/0284—Variable control of exhaust valves only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
- F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/021—Cooling cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/024—Cooling cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/027—Cooling cylinders and cylinder heads in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
- F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Characterised By The Charging Evacuation (AREA)
Abstract
An exhaust controller for a spark ignition type two stroke internal combustion engine capable of adjusting an exhaust timing by an exhaust control valve, characterized by sufficiently cooling an outer peripheral wall of an exhaust passage. In a spark ignition type two stroke internal combustion engine, a cylinder head side outer peripheral portion of an upstream portion of an exhaust passage smoothly connected to an exhaust port is formed of an exhaust passage forming portion of a lid member closing an exhaust control valve. A crank case side outer peripheral portion of the exhaust passage is formed of a cylinder block. The cylinder head side outer peripheral portion of the exhaust passage is cooled by a cooling water passage near a cylinder head which is formed in the lid member and the crank case side outer peripheral portion of the exhaust passage is directly cooled by a cylinder block cooling water passage near a crank case which is formed in the cylinder block.
Description
The present invention relates to a kind of on the spark ignition two-stroke IC engine that can adjust the time cycle of exhaust by gas exhausting valve, the exhaust control device that can be fully the periphery wall of exhaust passageway be cooled off.
As prior art, on spark ignition type 2 stroke IC engines: in casing bore, have the relief opening and the scavenge port that are opened and closed by the to-and-fro motion of piston with following formation, be formed with the exhaust passageway and the ventilation path that are connected with this relief opening and scavenge port respectively simultaneously, the new gas that is subjected to precompressed in crank chamber is sent in the casing bore through this ventilation path and scavenge port, the new gas that has been compressed in this casing bore is lighted a fire by ignition plug, and burnt gas is discharged to exhaust passageway from relief opening; For being reduced in blowing away of the stylish gas of ventilation, be provided with gas exhausting valve at relief opening, when being the low-speed running state, internal-combustion engine, and makes this relief opening open (with reference to Japan Patent " spy opens flat 7-71279 number " communique) when running up state at internal-combustion engine by the top obturation of this gas exhausting valve with relief opening.
On the internal-combustion engine that " spy opens flat 7-71279 number " communique is put down in writing, as Figure 30 and shown in Figure 31, through the exhaust passageway 03,04 that relief opening 02 is connected with casing bore 01, be formed at respectively on the cover part 08 of the narrow exhaust passageway parts 07 of holding gas exhausting valve 05 of cylinder block 06 and airtight this valve member 05, exhaust passageway parts 07; Be formed with on exhaust passageway parts 07 and the cover part 08 be positioned at above-mentioned exhaust passageway 03,04 above cooling water path 09,010; This two cooling water path 09,010 is interconnected, and the cooling water path 010 of above-mentioned cover part 08 is connected with the cooling water path 011 of cylinder block 06 simultaneously; Be fed into the part of cooling water of the cooling water path 011 of cylinder block 06 by not shown cooling waterpump, the flow through cooling water path 010 and 09 of cover part 08 and exhaust passageway parts 07 makes the top of exhaust passageway parts 07 and cover part 08 obtain cooling.
But, on general two stroke IC engine, because exhaust passageway is oblique to the crank box inclination, make the outer peripheral portion of the crank box side of exhaust passageway become narrow and small, so be positioned at the bottom of exhaust passageway parts 07 of below of exhaust passageway 03,04 and the bottom attenuation of cover part 08, do not have cooling water path in these bottoms, the bottom of exhaust passageway parts 07 is subjected to indirect cooling by the cooling water path 011 of cooling cylinder body 06.Like this, the bottom of these exhaust passageway parts 07 since in bigger scope with exhaust passageway 03 contacted result, the bottom that these exhaust passageway parts 07 can occur is subjected to the unfavorable phenomenon that high temperature heats easily.
The present invention relates to separate the improvement problem of exhaust control device of spark ignition two-stroke IC engine of unfavorable phenomenon of above-mentioned sample of having disappeared.Have through relief opening to the exhaust passageway of casing bore inner opening and with can reciprocally keep in the centerline direction freedom of casing bore along this relief opening, and can spark ignition two-stroke IC engine with the gas exhausting valve of the part blocking that is positioned at the cylinder head side at least of this relief opening on, it constitutes: with the above-mentioned relief opening outer peripheral portion of the cylinder head side of the upper reaches portion of consecutive exhaust passageway sleekly, formed by the cover part of airtight above-mentioned gas exhausting valve or exhaust passageway parts and the above-mentioned gas exhausting valve that is attached on this cover part; The outer peripheral portion of the crank box side of above-mentioned exhaust passageway is formed by cylinder block; The outer peripheral portion of the cylinder head side of above-mentioned exhaust passageway is cooled off by the cooling water path that is formed at above-mentioned cover part or is attached to the close cylinder head on the exhaust passageway parts of this cover part; The outer peripheral portion of the crank box side of above-mentioned exhaust passageway is by the directly cooling of cylinder block cooling water path institute that is formed at the close crank box on the said cylinder body.
In the present invention: because it has above-mentioned such formation, even it is so oblique to the crank box inclination at exhaust passageway, make the outer peripheral portion stenosis hour of the crank box side of exhaust passageway, there is not the cover part of airtight gas exhausting valve or is attached to exhaust passageway parts on this cover part in this part, but constitute the outer peripheral portion of the crank box side of exhaust passageway by cylinder block; The outer peripheral portion of the crank box side of this exhaust passageway is by the directly cooling of cylinder block cooling water path institute that is formed at the close crank box on the cylinder block; Simultaneously, the outer peripheral portion of the cylinder head side of above-mentioned exhaust passageway is cooled off by the cooling water path that is formed at above-mentioned cover part or is attached to the close cylinder head on the exhaust passageway parts of this cover part; Like this, the outer peripheral portion of exhaust passageway has just obtained roughly homogeneous and cooling fully in wide wide scope.
And, by making the present invention have the formation of alternative plan, just can be only by cover part and cylinder block being joined and are combined into one, and constitute the cooling water system that will be interconnected extremely simply near the cooling water path of the close cylinder head of the cylinder block cooling water path of crank box and cover part.
Further, have the formation of third party's case by making the present invention, the front-end control face that just can make gas exhausting valve is along carrying out slyness up and down and being easy to mobile.
And, have the formation of cubic case by making the present invention, be upright occasion at casing bore, just can make the deadweight of cover part stable and constitute portion by the exhaust passageway of cylinder block securely and supported.
And, by making the present invention have the formation of the 5th scheme, just can be can be joltily by after being pivotally mounted on the cover part with gas exhausting valve, cover part is installed on the cylinder block, and exhaust control device is installed on the two stroke IC engine, make above-mentioned gas exhausting valve be stabilized and support reliably in the mode that can freely shake; Simultaneously, can also improve the efficiency of assembling of above-mentioned two stroke IC engine, reduce cost.
Further, has the formation of the 6th scheme by making the present invention, when opening the state of gas exhausting valve, just can make not turbulization of the exhaust of discharging from relief opening, but make it to flow down sleekly, charging efficiency is improved, thereby improve the output and the efficient of internal-combustion engine.
Below, Fig. 1 is described to an example of the present invention shown in Figure 23.
Fig. 1 is the profile with spark ignition two-stroke IC engine of exhaust control device of the present invention.
Fig. 2 shown on the vertical disconnected profile of Fig. 1, the diagrammatic sketch of the state that gas exhausting valve has shaken downwards.
Fig. 3 is the vertical disconnected front elevation that the III-III line along Fig. 2 blocks.
Fig. 4 is the cross-sectional plan that the IV-IV line along Fig. 2 blocks.
Fig. 5 is the vertical disconnected profile of part that the V-V line along Fig. 4 blocks.
Fig. 6 is the vertical disconnected front elevation of part that the VI-VI line along Fig. 5 blocks.
Fig. 7 is when the state that gas exhausting valve has shaken upward, the vertical disconnected profile of the part identical with the 5th figure.
Fig. 8 is the vertical disconnected front elevation of part that the VIII-VIII line along Fig. 7 blocks.
Fig. 9 is the major component profile when adorning the state of cover part on cylinder block.
Figure 10 is the planimetric map of Fig. 9.
Figure 11 is the view of the XI-XI direction of Fig. 9.
Figure 12 is the view of the XII-XII direction of Fig. 9.
Figure 13 is the cross-sectional plan that the XIII-XIII line along Fig. 9 blocks.
Figure 14 is the vertical disconnected front elevation that the XIV-XIV line along Fig. 9 blocks.
Figure 15 is the vertical disconnected profile that the XV-XV line along Figure 11 blocks.
Figure 16 is the cross-sectional plan that the XVI-XVI line along Figure 15 blocks.
Figure 17 is the profile diagram that the XVII-XVII line along Figure 11 blocks.
Figure 18 is the profile diagram that the XVIII-XVIII line along Figure 17 blocks.
Figure 19 be the part of cover part cut stereogram.
Figure 20 is the stereogram of gas exhausting valve.
Figure 21 is the profile of Figure 20.
Figure 22 is the planimetric map of Figure 20.
Figure 23 is the view of the XXIII direction of Figure 21.
Figure 24 is the vertical disconnected profile of other example.
Figure 25 is the cross-sectional plan that the XXV-XXV line along Figure 24 blocks.
Figure 26 is the cover part among Figure 24 and the front elevation of exhaust passageway parts.
Figure 27 is the profile diagram that the XXVII-XXVII line along Figure 24 blocks.
Figure 28 is the back elevation of exhaust passageway parts.
Figure 29 is the stereogram of exhaust passageway parts.
Figure 30 is the vertical disconnected profile of existing spark ignition two-stroke IC engine.
Figure 31 is the stereogram of the exhaust passageway parts on the internal-combustion engine of Figure 30.
Spark with venting gas appliance of the present invention, igniting type two stroke IC engine 1 is for a kind of posture that erects upward with its cylinder block 3 is contained in single-cylinder internal-combustion engine (also can be internal-combustion engine with multi-cylinders) on the not shown automatic two-wheeled cycle.On this spark ignition two-stroke IC engine 1, overlapping successively the cylinder block 3 and the cylinder head 4 that mutually combine and be integral above crankcase 2.
And,, be embedded with the piston 6 that can easy on and off slides at the casing bore 5 that is formed at cylinder block 3.This piston 6 and bent axle 8 are being interconnected by connecting rod 7.Be accompanied by the lifting of piston 6, crank 8 can be driven in rotation.
Further, the air suction way 10 that is connected with crank chamber 9 in the crank box 2 is positioned at the rear of cylinder block 3 and is formed on the crank box 2.On this air suction way 10, be situated between pilot valve 11 is housed.On the vent path 10 of the upstream side that is positioned at pilot valve 11, be situated between not shown Carburetor is housed.On the inner peripheral surface of casing bore 5, be provided with scavenge port 12.On the position relative above this scavenge port 12, be provided with relief opening 13 with air suction way 10.Scavenge port 12 is connected with crank chamber 9 through the ventilation path 14 of cylinder block 3, and relief opening 13 is connected with the exhaust passageway 15 of cylinder block 3.This exhaust passageway 15 is opened to car body the place ahead.
Further, on the recess of the firing chamber above the casing bore 5 16, be provided with ignition plug 17., in pilot valve 11 is drawn into the crank chamber 9 of negative pressure, and when descending stroke, be compressed when upward stroke with the mutually mixed new gas of fuel by not shown Carburetor; Simultaneously, when piston 6 descends, when scavenge port 12 is opened, compress new gas and be fed in the firing chamber 16 by ventilation path 14.Compress entering of new gas by this, the part of the own combustion gas body in the firing chamber 16 can be discharged to exhaust passageway 15 through relief opening 13.When making scavenge port 12 by the rising of piston 6, when making relief opening 13 produce obturation subsequently, the mixed gas cognition of firing chamber 16 is compressed by the rising of piston 6, is lighted a fire by ignition plug 17 near upper dead center.
And, on the top that is positioned near the exhaust passageway 15 the relief opening 13 of cylinder block 3, be formed with and see from the side and be roughly fan-shaped housing recess 18.This housing recess 18 is covered by the cover part 20 with the exhaust passageway 41 on the dirty extended position of the exhaust passageway 15 of cylinder block 3.
Further, being configured in the gas exhausting valve 21 in the above-mentioned housing recess 18, to shown in Figure 23, is roughly fan-shaped as Figure 20 on lateral plan.Be formed with a support 22 at this roughly fan-shaped center, this support 22 is provided with splined hole 23; On the bottom surface of this gas exhausting valve 21, be formed with on plane view its front-end edge and have diapire 24 with the roughly the same curvature of the upper limb of casing bore 5; Be provided with sidewall 25 from the both side edges of this diapire 24 is upright squarely upward, simultaneously, from the upright upward planar control wall 26 of circular arc that is provided with of the front-end edge of this diapire 24; On the both sides of this control wall 26, be formed with the extension 27 that stretches out to the side along the side face of casing bore 5 by above-mentioned sidewall 25; Substantial middle position at above-mentioned diapire 24 is provided with intercommunicating pore 28.
And, as shown in Figure 4, the chimeric spline part 30 that valve live axle 29 is arranged on the splined hole 23 of gas exhausting valve 21, than this spline part 30 near chimeric the axle collar 35 on minor diameter parts 31 of front end, screw thread is combined with nut 36 on the front end of this minor diameter part 31, and gas exhausting valve 21 is being combined with valve live axle 29 with being integral.
And the base portion 32 of valve live axle 29 has the diameter identical with the external diameter of the axle collar 35, and chimeric successively pulley 37, the axle collar 38 and packing ring 39 on the cardinal extremity minor diameter part 33 of this base portion 32 are being combined with nut 40 near screw thread on the screw section 34 of this cardinal extremity.
And cover part 20 to shown in Figure 19, has the consecutive sleekly dirty exhaust passageway 41 of dirty portion with the exhaust passageway 15 of cylinder block 3 as Figure 11 and Figure 15; This cover part 20 by the first half that surrounds this dirty exhaust passageway 41 and within it portion be formed with cooling water path 42 cap body 43 and can with the housing recess 18 of said cylinder body 3 in produce on lateral plan, forming portion 44 and being constituted of loose fits by fan-shaped tabular exhaust passageway.On above-mentioned cap body 43, as shown in figure 15, forming the superjacent air space that portion 44 is being seized on both sides by the arms by this exhaust passageway, on lateral plan, be formed with the exhaust passageway formation portion 44 and the outstanding partition wall 45 of its central angle of cover part 20 than the narrow and small fan shape of the sidewall 25 of gas exhausting valve 21.In this outstanding partition wall 45, also be formed with cooling water path 42.As Figure 11 and shown in Figure 12, on the mating face 46 of cap body 43,4 positions about descending thereon are provided with the cooling water connecting port 49 through the mating face 48 of cylinder block 3, and the cooling water that can be connected with the cooling water path 50 of cylinder block 3 is communicated with 47.On cylinder head 4, also be formed with the cooling water path 51 that can be connected with cooling water path 50.
And, exhaust passageway 15 on cylinder block 3, as Fig. 6, Fig. 8 and shown in Figure 14, portion 52 locates to be made of the channel wall 53 of part transverse section by the ellipticity bending below will leaning on contacted stage below the exhaust passageway formation portion 44 of specific energy and cover part 20; Form by inside bend face 54, the exhaust passageway of this channel wall 53 the inboard exhaust passageway flexure plane 55 of portion 44 and gas exhausting valve 21 diapire 24 following 56 form its major axis for towards about the exhaust passageway of elliptical shape of substantially horizontal.
Further, in the exhaust passageway formation parts 44 of pairing left and right, as Figure 11 and shown in Figure 17, the direction from cover part 20 toward cylinder blocks 3, right-hand exhaust passageway formation 44r of portion is provided with location through hole 57; Simultaneously, as Figure 20, Figure 21 and shown in Figure 23, right-hand sidewall 25r of gas exhausting valve 21 is provided with location blind hole 58.On the cap body 43 and exhaust passageway formation portion 44 of above-mentioned cover part 20, the pivot that valve live axle 29 is carried out pivot suspension that is formed with the fan-shaped center that is positioned at these exhaust passageway formation parts 44 props up hole 59 (with reference to Figure 15 to Figure 18).When the pivot at left prop up on the hole 591 chimeric on behind the axle collar 35, configuration gas exhausting valve 21 between the exhaust passageway formation portion 44 of above-mentioned pairing left and right; The location that simultaneously not shown locating bar is inserted into the exhaust passageway formation 44r of portion makes gas exhausting valve 21 location with the location of the sidewall 25r of through hole 57 and gas exhausting valve 21 with blind hole 58.And, under the state that the center of the splined hole 23 of gas exhausting valve 21 and center that pivot props up hole 59 are involutory, by prop up hole 59r from right-hand pivot valve live axle 29 is inserted into the splined hole 23 and the axle collar 35, and on the minor diameter part 31 of valve live axle 29, screw togather fastening upper cap nut 36, and gas exhausting valve 21 is being adorned on valve live axle 29, simultaneously, through this valve live axle 29, this gas exhausting valve 21 can with can carry out mode that easy on and off shakes by pivot suspension in the exhaust passageway formation portion 44 of cover part 20.
And, as shown in Figure 3, be integral ground embedding on the running shaft 61 of cooling waterpump 60 driven gear 62 be meshed for the driving gear 63 of one with crankshaft 8.When crankshaft 8 rotations, cooling waterpump 60 is driven in rotation.The cooling water of being discharged by this cooling waterpump 60 flows into the cooling water path 50 of cylinder block 3; A part wherein is by opening after 49,47 bottom flows into cooling water path 42, turns back to cooling water path 50 from opening 49,47 top, further flows into the cooling water path 51 of cylinder head 4.By such cooling water cylinder block 3, cylinder head 4 and cover part 20 are cooled off.In addition, the cooling water of being discharged from the cooling water outlet 64 of the cooling water path 51 of cylinder head 4 is sent to not shown radiator, after being cooled on this radiator, turns back to the suction port 65 of cooling waterpump 60 again.
Further, above-mentioned pulley 37 is connected with the driven pulley of not shown servomotor through cable 66.Above-mentioned servomotor obtains Spin Control by the control signal of the CPU that calculates according to the control graph of need behind the input signal of the aperture of the rotational speed by receiving spark ignition two-stroke IC engine 1, throttle valve and pressure of inspiration(Pi) etc.When spark ignition two-stroke IC engine 1 was the low-speed running state, gas exhausting valve 21 was shaken downwards by this servomotor; And at spark ignition two-stroke IC engine 1 when running up state, gas exhausting valve 21 is shaken upward by above-mentioned servomotor.
On the example shown in Fig. 1 to Figure 23, owing to have above-mentioned such formation, so when the such low-speed running state of no-load running, as Fig. 7, shown in Figure 8, gas exhausting valve 21 shakes downwards, the inaccessible finish-time of the relief opening 13 when the upward stroke of piston 6 is shifted to an earlier date, the open elapsed time of the relief opening 13 when the descending stroke of piston 6 is postponed, compression ratio is increased, and increased volume by housing recess 18 and 21 cingens space portions 67 of gas exhausting valve.
Therefore, when such low-speed running state, by increasing, make the pipe range increase of the essence of this vent systems through the volume of intercommunicating pore 28 with the space portion of forming by exhaust passageway 15, dirty exhaust passageway 41 and not shown outlet pipe that vent systems had been communicated with 67.The malleation reflected wave of the exhaust when the low-speed running state is at the end closing the time cycle in the obturation of relief opening 13 and is arriving this relief opening 13.By such malleation reflected wave,, make the discharge of new gas controlled having stoped from relief opening 13 in the blowing away of the new gas (unburned gas) of exhaust passageway 15 and dirty exhaust passageway 41.Thereby improved the charging efficiency when the low-speed running state, output is increased, also reduced fuel cost simultaneously.
And when gas exhausting valve 21 dropped to the state of lower limit, residual in firing chamber 16 had a large amount of burnt gas, and the temperature in the firing chamber 16 is maintained at high temperature; Simultaneously,, make near upper dead center, to produce active hot atmosphere burning, avoided the significantly reduction of output, and can stop the increase of unburned hydrocarbons amount in the exhaust gas by the increase of compression ratio.
And, from the low-speed running state, acceleration along with crankshaft 8, as shown in Figure 5 and Figure 6, because gas exhausting valve 21 is shaken upward, postponed the inaccessible finish-time of the relief opening 13 when the upward stroke of piston 6, the opening hours of the relief opening 13 when the descending stroke of piston 6 are shifted to an earlier date, and the volume of space portion 67 is dwindled, so a large amount of gas exchange can successfully be carried out, can realize the pulsation effect of exhaust pressure.Simultaneously, the malleation reflected wave of the exhaust when running up state is at the end closing the time cycle in the obturation of relief opening 13 and is arriving this relief opening 13, is suppressed from the discharge of the new gas of relief opening 13 by this malleation reflected wave.Thereby might can increase output keeping lower fuel cost.
Further, the volume of above-mentioned space portion 67, owing to can change continuously corresponding to the degree that fluctuates of gas exhausting valve 21, make the pipe range of the essence of vent systems also produce continuous variation thereupon, so with the pipe range of the essence of its vent systems on existing spark ignition two-stroke IC engine is that to get the situation of 2 values of size different, present embodiment can have high exhaust pressure pulsation effect in the scope of broadness from the low-speed running district to the district that runs up.
And, on cover part 20, because the periphery of its dirty exhaust passageway 41 surrounded by cooling water path 42, so the periphery wall of dirty exhaust passageway 41 can be cooled off fully with dirty exhaust passageway 41.Simultaneously, cover part 20 is owing to being subjected to the cooling of approximate equality, so can avoid taking place big thermal distortion on cover part 20.
Further, as shown in Figure 5 and Figure 6, shake upward at gas exhausting valve 21, relief opening 13 be standard-sized sheet state the time, the Lower Half of the exhaust gas of discharging from the relief opening 13 of cylinder block 3 is along the exhaust passageway 15 of cylinder block 3 and flow; Simultaneously, the first half of this exhaust gas, as shown in Figure 6, along below the diapire 24 of the exhaust passageway flexure plane 55 of the inboard of the exhaust passageway formation portion 44 that forming with the consecutive sleekly shape of the inside bend face 54 of this exhaust passageway 15 and gas exhausting valve 21 56 and flow.Subsequently, both collaborate mutually in the mode that does not produce fierce turbulent flow on dirty exhaust passageway 41 and successfully flow, and the gas exchange in firing chamber 16 can successfully be carried out.
And, as shown in Figure 7 and Figure 8, shake downwards at gas exhausting valve 21, relief opening 13 by constriction state the time, the extension 27 that stretches out to two sides from the control wall 26 of gas exhausting valve 21 connects airtight mutually with the front-end face of exhaust passageway formation portion 44, makes the exhaust passageway flexure plane 55 that covers the inboard of this exhaust passageway formation portion 44 from the place ahead; And, owing to constituting above the stream vis-a-vis with the inside bend face 54 of the channel wall 53 of exhaust passageway 15 by following 56 of the diapire 24 of gas exhausting valve 21, thus still can make not turbulization of exhaust, but successfully run down into dirty exhaust passageway 41.Thereby when the low-speed running state, also can successfully carry out exchange gas.
Moreover, shake downwards at gas exhausting valve 21, relief opening 13 by constriction occasion, in the time of between below the diapire 24 of the last ora terminalis of piston 6 ora terminalis and gas exhausting valve 21 on relief opening 13, combustion gas in the casing bore 5 can will be to the outstanding protuberance 68 (with reference to Fig. 4) of central direction by the ora terminalis of extension 27 that stretches out to two sides of the control wall 26 of gas exhausting valve 21 and the ratio extension 27 on the both sides of the relief opening 13 of cylinder block 3, as shown in Figure 8, be prevented from flowing in the interval between the outside 69 of the sidewall 25 of the inboard steam discharge path flexure plane 55 of exhaust passageway formation portion 44 and gas exhausting valve 21.Can prevent thus combustion gas from casing bore 5 to the spilling of dirty exhaust passageway 41, increase scavenging efficiency and filling effect.Consequently can improve the output and the efficient of spark ignition two-stroke IC engine 1.
Further, as shown in Figure 4 because cover part 20 is provided with exhaust passageway formation portion 44, thus the gas exhausting valve 21 with extension 27 can be positioned at the protuberance 68 on the relief opening 13 of cylinder block 3 obstruction be encased in exhaust passageway 15.
And, because the path of the following direct and exhaust passageway 15 that constitutes cylinder block 3 of the exhaust passageway formation portion 44 of cover part 20.The stage portion of the upper limb of wall 53 52 accepts mutually, thus the major part of the deadweight of cover part 20 can be supported by the stage portion 52 of this cylinder block 3, even also can make cover part 20 correct and be securely fixed on the position of needs of cylinder block 3 without lock pin.
To the example shown in Figure 23, gas exhausting valve 21 be roughly fan-shaped on lateral plan at Fig. 1, and is by axle support 22, diapire 24, two side 25 and controls wall 26 and constituted.But to shown in Figure 29, also can be a kind of following such formation as Figure 24: use the tabular gas exhausting valve 70 identical with the gas exhausting valve 05 of Figure 30; After the Lower Half excision with the exhaust passageway parts 07 of Figure 31, form as Figure 28 and the exhaust passageway parts of adorning on cover section 71 72 shown in Figure 29; To be formed on the cylinder block 74 corresponding to the channel wall 73 of the Lower Half of cut exhaust passageway parts 07.Owing to this channel wall 73 is directly cooled off by cooling water path 50, so can not heated by high temperature.
Claims (6)
1. the exhaust control device of a spark ignition two-stroke IC engine, the formation of this spark ignition two-stroke IC engine comprises: through the exhaust passageway of relief opening to the casing bore inner opening, with with can reciprocally be held in the centerline direction freedom of casing bore along this relief opening, and the part blocking that is positioned at the cylinder head side at least of this relief opening can be is characterized in that:
With the above-mentioned relief opening outer peripheral portion of the cylinder head side of the upper reaches portion of consecutive exhaust passageway sleekly, formed by the exhaust passageway parts and the above-mentioned gas exhausting valve of airtight the cover part of above-mentioned gas exhausting valve/be attached on this cover part; The outer peripheral portion of the crank box side of above-mentioned exhaust passageway is formed by cylinder block; The outer peripheral portion of the cylinder head side of above-mentioned exhaust passageway is cooled off by the cooling water path of the close cylinder head on the exhaust passageway parts that are formed at this cover part of above-mentioned cover part/be attached to; The outer peripheral portion of the crank box side of above-mentioned exhaust passageway is by the directly cooling of cylinder block cooling water path institute that is formed at the close crank box on the said cylinder body.
2. exhaust control device as the described spark ignition two-stroke IC engine of claim 1, it is characterized by:, be formed on along on the mating face of the said cylinder body of said cylinder centerline hole direction and above-mentioned cover part with above-mentioned cylinder block cooling water path and the cooling water opening that has been interconnected of the cooling water path of the close cylinder head of above-mentioned cover part near crank box.
3. exhaust control device as claim 1 or 2 described spark ignition two-stroke IC engines is characterized by: above-mentioned gas exhausting valve, be divided into the center by dirty cylinder head sidepiece with above-mentioned exhaust passageway and can freedom joltily pivot suspension.
4. exhaust control device as the described spark ignition two-stroke IC engine of claim 3, it is characterized by: exhaust passageway formation portion/the be attached to exhaust passageway parts on this cover part of above-mentioned cover part that constitute the upper reaches cylinder head side part of above-mentioned exhaust passageway, the crank box side from the cylinder head side direction, be connected in the exhaust passageway formation portion of the upper reaches crank box side said cylinder body partly that constitutes above-mentioned exhaust passageway.
5. exhaust control device as the described spark ignition two-stroke IC engine of claim 4 is characterized by: above-mentioned gas exhausting valve, by pivot suspension joltily in the exhaust passageway formation portion of above-mentioned cover part.
6. exhaust control device as claim 4 or 5 described spark ignition two-stroke IC engines, it is characterized by: constitute the exhaust passageway formation portion of the upper reaches cylinder head side above-mentioned cover part partly of above-mentioned exhaust passageway, be provided in the both sides of above-mentioned gas exhausting valve.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP172519/1996 | 1996-07-02 | ||
| JP172519/96 | 1996-07-02 | ||
| JP8172519A JPH1018842A (en) | 1996-07-02 | 1996-07-02 | Exhaust controller for spark ignition type 2-stroke internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1170081A true CN1170081A (en) | 1998-01-14 |
| CN1075868C CN1075868C (en) | 2001-12-05 |
Family
ID=15943462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97113544A Expired - Fee Related CN1075868C (en) | 1996-07-02 | 1997-06-27 | Exhaust controller sparkling two stroke IC engine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5829394A (en) |
| JP (1) | JPH1018842A (en) |
| CN (1) | CN1075868C (en) |
| AU (1) | AU721646B2 (en) |
| IT (1) | IT1292784B1 (en) |
| TW (1) | TW334495B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400761A (en) * | 2010-09-16 | 2012-04-04 | 本田技研工业株式会社 | Cooling-means-equipped, liquid-cooled engine |
| CN112727589A (en) * | 2021-01-09 | 2021-04-30 | 重庆隆鑫通航发动机制造有限公司 | Water-cooled engine and unmanned aerial vehicle |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2232761C (en) * | 1997-03-31 | 2006-05-23 | Honda Giken Kogyo Kabushiki Kaisha .) | Two-cycle engine |
| JP3865195B2 (en) * | 2000-06-06 | 2007-01-10 | 本田技研工業株式会社 | Exhaust control device for two-cycle internal combustion engine |
| JP5495665B2 (en) * | 2009-08-10 | 2014-05-21 | キヤノン株式会社 | Organic compound and organic light emitting device using the same |
| WO2012161800A2 (en) * | 2011-02-24 | 2012-11-29 | University Of Idaho | Rotary synchronous charge trapping |
| DE202012101134U1 (en) * | 2012-03-29 | 2013-07-01 | Makita Corporation | Internal combustion engine, in particular 2-stroke internal combustion engine |
| US11761358B2 (en) | 2022-02-16 | 2023-09-19 | Arctic Cat Inc. | Multi-port exhaust valve for two-stroke engines |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3326837B2 (en) * | 1992-12-28 | 2002-09-24 | スズキ株式会社 | Exhaust timing control device for two-stroke engine |
| JP4030134B2 (en) * | 1993-01-08 | 2008-01-09 | 本田技研工業株式会社 | Combustion control device for spark ignition type 2-cycle engine |
-
1996
- 1996-07-02 JP JP8172519A patent/JPH1018842A/en active Pending
-
1997
- 1997-06-17 TW TW086108463A patent/TW334495B/en active
- 1997-06-19 IT IT97TO000532A patent/IT1292784B1/en active IP Right Grant
- 1997-06-27 CN CN97113544A patent/CN1075868C/en not_active Expired - Fee Related
- 1997-07-01 AU AU28414/97A patent/AU721646B2/en not_active Ceased
- 1997-07-02 US US08/887,227 patent/US5829394A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400761A (en) * | 2010-09-16 | 2012-04-04 | 本田技研工业株式会社 | Cooling-means-equipped, liquid-cooled engine |
| CN112727589A (en) * | 2021-01-09 | 2021-04-30 | 重庆隆鑫通航发动机制造有限公司 | Water-cooled engine and unmanned aerial vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| AU721646B2 (en) | 2000-07-13 |
| TW334495B (en) | 1998-06-21 |
| CN1075868C (en) | 2001-12-05 |
| JPH1018842A (en) | 1998-01-20 |
| AU2841497A (en) | 1998-01-15 |
| IT1292784B1 (en) | 1999-02-11 |
| ITTO970532A0 (en) | 1997-06-19 |
| ITTO970532A1 (en) | 1998-12-19 |
| US5829394A (en) | 1998-11-03 |
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